Pipe cutter



G. HAMMOND Dec. 15, 1936.

PIPE CUTTER I Filed April 23, 19:55

Lllllr may Patented Dec. l5,k A19356 PIPE GUTTER Grant Hammond, Hamden,Conn., assigner w The Barnes Tool C`ompany,'New Haven, Conn., acorporation of Connecticut Application April 23, 1935,v SerialNo\.'17,803

2 Claims.

Thepresent invention relates to cutting tools for pipes or bars, andmore particularly to a tool of this character using a blade-typecutterin- -stead of the Wheel or disk cutter usually employed in tools of thischaracter.

A pipe or rod cutter employing a cutting blade should also be providedwith cooperating jaws to engage the exterior surface of the pipe so thatthe tool will be held in proper relation to the work during the cuttingoperation. These jaws should, of course, be relatively adjustable toprovidefor the usev of the tool with pipes of various sizes, and it isalso necessary to provide' for the proper adjustment of the cutterrelatively to the jaws so that when the jaws engage the surface of thework, the cutter may be fed intol the work as the cut is made in orderto completely sever the pipe or rod which is being cut.

It is advantageous to dispose the cutter in the movable jaw and it istherefore desirable to provide for the cutter to be moved to and fromthe work with this jaw, and in addition, to have a feeding movementrelatively to the jaw so that it can be fed into the work.

One object of the invention is to provide an eflicient and serviceabletool of the type described.

Another object of the invention is to provide an eflicient andserviceable pipe or rod cutter of the type described which may bemanufactured at a relatively low cost.

Another object of the invention is the provision of ablade-type pipe orrod cutter which may be manufactured at a relatively low cost and whichwill be provided with means for holding the cutter in proper relation tothe work so that a true and accurate cut may be made.

A still further object of the invention is the provision of a blade-typepipe or rod cutter provided with relatively stationary and movable jaws,with the cutter provided in the movable jaw, and the cutter itself beingadjustably mounted so that it may be fed into the work and at the sametime may be moved forwardly as it is used so that it may be resharpenedand render a long period of service.

'I'o these and other ends, the invention consists in the novel featuresVand combinations of parts to be hereinafter described and claimed.

In the drawing:

Fig. 1 is a side elevational view of a pipe or rod cutter embodying myimprovements;

Fig. 2 is a longitudinal sectional view of the working parts of the toolshown in Fig. 1;.

Fig. 3 is a sectional view on line 3-3 of Fig. 2;

Fig. 4 is a sectional View on line II--4 of Fig. 2;

Fig. 5 represents side and end elevational views of the cutter-holdingcheek.

yIn the illustration of one preferred embodiment of my invention, I haveshown a pipe cutter having a body portion or stock I0 provided with ajaw I I Vat one end. At its other end is provided with a hollow bracketI2 which is internally threaded'tov receive the threaded` portion `setinto an opening I6 in the stock.

A cooperating jaw member I1 having jaw portions I9 and20 whichcooperatewith the jaw Ill to hold'the work 2| is' movably mountedrelatively to the stock I0. To effect this end, the jaw mem-"- ber I1may be provided with a U-shaped or stirrup-shaped portion 22'whichembraces the stock and slides thereon, so that the jaw member will beaccurately'guided for sliding movement on the stock but will beheld inproper relation to the fixed jaw II. In the jaw 20 isprovided a chipclearance cut 20a to permit the escape of the chips which are cut fromthe work.

The forward end of the handle member I4 extends within a bore 23 of thejaw member I'I and is provided with an annular-'groove 24 which receivesthe end of a setscrew 2 secured iny the jaw member I1, so that thehandle member I4 is secured to the jaw but permitted to rotaterelatively thereto. It will be apparent thatfwhen the handle member I4is turned'it `will be moved longitudinally through the threaded bracketI2 and will thus move the jaw slidably upon the stock II) relatively tothe jaw I I in order that the space between the cooperating jaws maybeadjusted to the pipe or rod which it is desired to cut.

The jaw member II has an opening therethrough and within this opening ismounted a cheek piece 26, shown in Fig. 5, having a slot 2l therein toreceive the cutting blade, as will be hereinafter explained. The cheekpiece- 26 is provided at'its lower side witha semicircular the stockrecess23, and a corresponding recess is provided in the surface ofthebore in the member I1 to provide an opening toV receive a pin 29 tosecure the cheek against rotation within the member Il. The pin, ofcourse, also secures the cheekagainst any longitudinal movement withinthis member.

The handle member `Ill is likewise hollow and the bore of this member isin alignment with the bore'in the member Il in which the cheek piece 26is mounted. A cutting blade 30 in the form of a narrow flat member ismounted within the member I'I and forward end of the handle I'l and isreceived within the slot 21 in the cheek piece 2G. This blade or cutteris of a size to make a relatively close sliding fit within the slot 21,so that the cutter is held against lateral orrotational movements by itsengagement within this slot.

lThe cutter may be of any'appropriate length in order to provide asuiiicient period of service and Yextends rearwardly into-.Itheforwardend of the handle I4. To the rear end of the cutter is secured a rod 3|,the co-nnection being made by the provision of a slot in the forwardvend of lthis rod which receives the rear end of the cutter, and a pin 32may be passed through the walls of the slot and the rear end of thecutter.

the handle member I4, and while it is slidably mounted within thehandle, it will be held against rotation therein by its connection withthe cutter 30, which in turn is held against rotation by the cheek piece26.

Also mounted within the hollow handle I4 is an adjusting sleeve 33internally threaded, as at 34, to receive the threaded reduced end 35 ofthe rod 3l., 'The sleeve 33'is rotatably mounted within the handle andhas an extended end 36 projecting from the handle, upon which may bemounted an adjusting button or finger' piece 3l.

The sleeve 33 may be rotatably held within the handle member I4 in aconvenient way by provding this sleeve with an external annular rib orVshoulder 38 which may be received in an enlarged portion 39 of the boreof the handle member. A sleeve 40 is mounted in the enlarged portion ofthe bore in the handle member back of the annular rib 38 to hold thelatter in place, the' collar 40 being held in position by a setscrew 4Ipassing through the wall of the handle member I4 and having its endengaged in the sleeve.

Upon the lower end of the handle I4 there may be provided a tubular grip42 which surrounds the handle and is knurled upon its outer surface, sothat the operator may secure a good grip thereon in manipulating thetool. The screw 4I passes through the wall of this grip member and isthreaded therein, so that this member holds the grip member 42 in placeas well as the collar 40.

A lock nut 43 is threaded upon the threaded portion I3 of the handle I4so that it may be setv up against the bracket member I2 to prevent ro-ytation of the handle I4 after the jaws have been' clamped upon the work.It may also be stated at this point that the sleeve 33 and the threadedportion of the rod 3I are preferably provided with left-hand threads, sothat turning the button 31 to the right will advance the rod 3| and feedthe cutter into the work.

The operation of the device is as follows:

When it is desired to apply the tool to a pipe or rod to out the same intwo, the grip member 42 may be rotated to the left`to` withdraw the jawmember I'I from the jaw I I in case the opening between the jaws is notsufficiently wide to take the pipe. When the cutter has been applied tothe pipe, the grip member 42 is rotated in the opposite direction, or,to the right. It will be understood that the rotation of the grip member42 also rotates the hollow handle member I4 soY as to cause the threadedportion I3 of this handle to advance in the internally threaded bracketI2, which will move the jaw member I'I toward the jaw II until the workis clamped tightly between the jaw I I and the jaw portions I9 and 20 onthe member II. During this operation the hollow handle member I4 rotateswithin the jaw member I I, the latter, of course, being held againstrotation, this movement being permitted by the engagement of the setscrew 25 within the slot 24. Also, the cutter or blade 30 will be heldagainst rotation by the cheek member 26, and the rod 3I and internallythreaded sleeve 33 will likewise beheld against rotation,

It Will be understood that the rod 3l is disposed within the handlemember I4 rotating upon these parts. The cutter 3|! will be carriedforwardly with the jaw member I'I but will not move relatively to thismember.

\ When the jaws have been set up against the 5 pipe, the lock nut 43 maybe turned up against the bracket I2 to prevent any accidental rotationof the handle member I4 which might take place during the pipe cuttingoperation and which would withdraw the jaw member II from tight 1I)engagement with the pipe.

The button or manually operable member 31 may be rotated to set thecutter against the work. When this has been done, the tool is rotatedabout the pipe by means of the grip l5 member 42 on the handle, and asthe cut is made about the periphery of the pipe, the button 31 is againrotated to feed the cutter into the work, and continued operation ofvthe tool severs; the work into two parts. It will be understood 20 thatwhile the tool is shown as operating upon a pipe, it may be employed tocut rods as well.

While I have shown and described a preferred embodiment of my invention,it will be understood that it is not to be limited to all of the 25details shown, but is capable of modification and variation within thespirit of the invention and within the scope of the appended claims.

What I claim is:

l. 'A pipe cutter comprising'a stock having a 30 jaw member upon one endthereof and being apertured adjacent its other end, an internallythreaded bracket having a lug extending therefrom and into saidaperture, a second jaw member slidably mounted upon the stock betweenits 35 ends, said second jaw member being hollow, a hollow handle memberthreadedly engaged with said bracket and rotatably secured to the hollowjaw member whereby the bracket, the stock, and

the second jaw member are maintained in assem`' 40 bled relation, ablade-like cutter mounted within the hollow jaw member for slidingmovement ther-ein, a rod secured in the handle member and connected tothe cutter, and means for advancing and retracting said rod. 45

2. A pipe cutter comprising a stock having a 'jaw member upon oneend'thereof and being lapertured adjacent its other end, an internallyvwithin the hollow jaw member and projecting 60 therefrom at the forwardend thereof, a cheek member rigidly secured within the hollow jaw memberadjacent its forward end and having a slot therein to slidably receivethe cutter to hold the latter against rotation, means for moving 55 thecutter and the jaw within which it is disposed toward the cooperationjaw, and means mounted within the handle member for moving said rodlongitudinally within the handle member to adjust the cutter relativelyto the jaw and To cheek memberv within which it is mounted.

GRANT HAlVIMOND.

